# Theoretical Pressure Calculations

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1. The formula FL=CQ^2L represents the formula for calculating friction loss. What does the 'C' stand for?
Friction loss coefficient
2. The formula FL=CQ^2L represents the formula for calculating friction loss. What does the 'L' stand for?
Hose length in hundreds of feet/100.
3. The formula FL=CQ^2L represents the formula for calculating friction loss. What does the 'Q' stand for?
Flow rate in hundreds of gpm/100.
4. You are about to test 50 foot lengths of hose to determine friction loss coefficients. How much hose should be laid out in order to perform an accurate test?
300 ft.
5. You are about to test 100 foot lengths of hose to determine friction loss coefficients. How much hose should be laid out in order to perform an accurate test?
400 feet
6. When determining friction loss coefficients using in-line gauges, how far from the pumper should the first gauge be placed if you are testing hose in 50 foot lengths?
50 feet
7. When determining friction loss coefficients using in-line gauges, how far from the first gauge should the second gauge be placed regardless of what length hose you are testing?
200 feet.
8. When determining friction loss coefficients using in-line gauges, how far from the second gauge should the nozzle be placed if you are testing hose in 100 foot lengths?
100 feet
9. Appliance friction loss is insignificant when the total flow through the appliance is less than -
350 gpm
10. When the total flow in a hoseline is greater than 350 GPM how much additional friction loss is calculated for each appliance other than master streams?
10 psi
11. How much additional friction loss is calculated in a hoseline when it is fitted with a master stream appliance?
25 psi.
12. When two hoselines of equal length are siamesed to supply a working fire stream, the friction loss is approximately __ of that of a single hoseline at the same nozzle pressure.
25%
13. When three hoselines of equal length are siamesed to supply a working fire stream, the friction loss is approximately __ of that of a single hoseline at the same nozzle pressure.
10%
14. To ensure safety and efficiency fog nozzles should be operated at a nozzle pressure of -
100 psi
15. To ensure safety and efficiency solid stream handline nozzles should be operated at a nozzle pressure of -
50 psi
16. To ensure safety and efficiency master stream nozzles should be operated at a nozzle pressure of -
80 psi
17. Your pumper is operating from a hydrant and is discharging water at 180 psi. The incoming pressure from the hydrant measures 20 psi on the intake gauge. Calculate the net pump discharge pressure.
160 psi
 Author: hispeeddev ID: 226083 Card Set: Theoretical Pressure Calculations Updated: 2013-07-06 03:08:01 Tags: pump Folders: Description: pump Show Answers: